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"{{tmz_video_0}}&lt;strong&gt;&lt;br /&gt;Justin Bieber&lt;/strong&gt;'s perfectly chiseled torso was threatened by a lone attacker in a Canadian nightclub -- leading to a big mystery:&amp;#160; Was JB's shirt ripped open, or did he voluntarily bare his abs?&lt;br /&gt;&lt;br /&gt;TMZ investigates ... &lt;br /&gt;&lt;br /&gt;&lt;a target=\"_blank\" href=\"http://www.tmz.com/when-its-on\"&gt;&lt;img alt=\"TMZ_On_TV_SubNavigation\" src=\"http://ll-media.tmz.com/2013/06/05/tmz-on-tv-subnavigation-2.jpg\" /&gt;&lt;/a&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.tmz.com/2013/09/03/justin-bieber-attacked-nightclub-tmz-tv/2/>